Abi-Dalzim's Horrid Wilting

You draw the moisture from every creature in a 30-foot cube centered on a point you choose within range. Each creature in that area must make a Constitution saving throw. Constructs and undead aren't affected, and plants and water elementals make this saving throw with disadvantage. A creature takes . 12 D 8 necrotic damage on a failed save, or half as much damage on a successful one.

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Nonmagical plants in the area that aren't creatures, such as trees and shrubs, wither and die instantly.